Belt for conveyers.



T. ROBINS.

BELT FOR OONVEYERB.

APPLIoATIoN FILED un. 22,1909.

9 1 3 ,9 1 7. Patented Mar, 2, 1909.

witnesses 52mm Svwamfoz STATES. 'PATENT OFFICE.'

THOMAS ROBINS, OF NEW YQRK, N". Y.

BELT Fon coNvEYEns..

To cllwtom it mayconcm;

-Be it .known that I,"Tn2oms'RoB1Ns, a

re'sidentof the city of New York, in the State of New York, have invented certainnew and useful Improvementsin Belts for Conveyers, of which the followingis a specificatlon, laccompaniedby drawings.

It has been customary tomake conveyer .gradually work in'between the rubber cover and the canvas,I causing what are known, as

blisters, which sooner or later become torn oil, leavin the -canvas bare in patches. Belts whic carry heavy pieces of sharp material are particularl apt tobecome injured in this way. here such rubber .belts are used for convieying hotmaterials also the rubber cover tends to become h'ardened and crack, these cracks frequently` "i'eaching the canvas and allowing the dirt or other materials to work into the belt in a similar way to that already mentioned.

The present im rovement seeks to produce .a belt that shall e less subject to deteriora.

tion from such causes as those .mentioned and shall have a wearing face of increased durability and which shall adhere to the canvas body of the-belt. 4It will, however, be understoodthat some parts of the invention may be used without others. In the accompanying drawings the invernl tion is shown as I prefer to employ it, and from a description of these. drawings the nature of the invention in its referreddetails will vbe readily understoo In the drawings, Fi re 1 is a reduced .cross sectional lv1ew o a iece obelting embodyirgthe invention. ig. 2 isa detail view of a portion ofFig.4 1 showing the various vplies of the belt .partly'torn apart for illustrative purposes. F1g.`3 is a cross section of aY modification Vomitting some ofthefeatures of Figs. 1 vand 2. At B are shown several thicknesses of *strong canvas between which are interposed Specification' of Letters Patent.-

, Application med April 22, 1908. Serial No. 1428,68?.

thin layers of rubber composition C, as usual in this class of vbelts'.`

At F is shown the cover or Wearing face of the belt, ,which -is preferably severaltimes as Patented March a, 1909.

thick upon the wearing face of the belt'as upon the lower or rear face of the belt, which only comes in contact with the. pulleys and does not carry the load. The wearing face or cover F- issecured to the uppermost layer of canvas by first coatin the upper sly ofcanvas with a thin layer 'of very goo rubber A"of relatively high adhesive quality as com ared with the rubber composition used for t e rest of the belt. Upon this is laid a layer E of very openly Woven cloth, such as cider-press cloth or cheesecloth, and on top oi this comes the usual rubbercom osition of the belt cover or wearing face F. he adhesive layer D,When the belt is vulcanized under pressure, readily .comes in intimate contact with the cheaper rubber of the cover through the openin s 1n the openwork fabric E, and this gives't e cover a much `better gripthan it would otherwise obtainV directly upon the canvas forming the bodyL of the belt and which is necessarily of a'closely Woven nature. The adhesive layer D of higher gradc rubber sticks very strongl to the canvas of the belt and forms a bond7 between the belt and the regular cover F. I furthermore embod atpabout the mid-thickness of the wearing ayer or cover F of the belt a layer G of loosely Woven o enwork cloth or fabric such as oiderpress c oth, scrim, or mosquito netting, it being laid in between two layers of the cover, as'indic'ated at the ri ht-hand end of Fig. 2 before the belt is finally vulcanized under pressure. This layer is sufficiently openwork for ithe rubber composition to cover and thepcanvas in the way mentioned and largely prevent the formation of bare patches. y In Fig. 3 a cross section of belt is shown in readily penetrate it and constitute substanetween the rubber which the adhesive layer D and openwork ing layer of the belt a cover, andthat thel binding layerG .is within the cover while the layers vD and E form intermediate layers.

firmly uniting the cover to the backing or body of the belt. By rubber I-mean also to include substitute or equivalent compositiolns acting in the same way in the nished be t.

What I- claim and desire to secure by Letters Patent is the following:

' 1. A belt for conveyers having in addition to a layer 'or series of layers of relatively strong close fabric and rubber composition constltuting a backing or body, a Wearing face or cover of resilient composition-containing within it a binding layer of o enwork fabric through which the materia of the l'cover penetrates and having between the v backin or body and the wearin face an adhesive ayer of relativel hgh'ad esive uality and an openwork abrio through W ich the said adhesive layer penetrates and unites the cover and backing, for substantially the purposes set forth.

2. A belt for conveyers having a relatively strong backing or body anda cover of rubber composition containing within it a binding layer of o enwork-fabric, an openwork fabric between t e cover and body, and an adhesive layer penetrating the last said fabric and uniting the cover and body, for substantially the pur oses set forth. V

3. A elt for conveyers having a body ortion of relatively strong fabric and ruber and a wearin layer or cover having between the wearing face and the bod of the belt a binding layer of openwork abric through which the material of the wearing face penetrates, for substantially the purposes set forth.

4. A belt for conveyers having a relatively strong and stiH backingor body and a relatively resilient wearing layer or cover and having embedded within the wearing layer or cover an openwork binding fabric G, for substantially the purposes set forth.

5. A belt havin a backing or body of one or more layers o rubber com osition and strong fabric, a relatively resilient wearing 'layer or cover and an intermediate adhesive layer of relatively high adhesive quality, and an openwork fabric through which the said adheslve layer penetrates, for substantlally the purposes set forth. ,Y v

In testimony whereof -I have signed this specification in the resence of two subscribing witnesses, Apri 21, 1908.

` THOMAS RoBrNs.

' Witnesses;v d

A. E. LemNG'roN y A. M. GILLIGAN. 

